Display settings keep changing from what I set?

Every time My computer is left alone it goes to sleep or goes to screen saver mode, and when I begin to use it the display has changed the resolution size. I always have to go to personalize and reset the size back to what I want again. This does not seem
right to me. I'm new to Vista so I'm still learning the system. However I know this is not what has tyo be done every time I stop using the computer. Where can I set the display to my settings and keep it until I want to change it?
Thanks for your time.
Bob

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Question Info

You need to update your Display updater from the computer manufacturer’s website to resolve your issue.

If that does not work, you need to do a System restore.

Follow the instructions below to restore the computer to the earlier state.

To restore the operating system to an earlier point in time, follow these steps:

Click Start, type system restore in the
Start Search box, and then click System Restore in the
Programs list. If you are prompted for an administrator password or confirmation, type your password or click
Continue.

In the System Restore dialog box, click
Choose a different restore point, and then click Next.

In the list of restore points, click a restore point that was created before you began to experience the issue, and then click
Next.

Click Finish.

The computer restarts, and the system files and settings are returned to the state that they were in at the time that the restore point was created.

If that does not work we need to perform a system file checker (SFC) scan.